---
product_id: 16800459
title: "Terminal Blocks 20A - 65A"
brand: "blue sea systems"
price: "£16.92"
currency: GBP
in_stock: true
reviews_count: 13
category: "Blue Sea Systems"
url: https://www.desertcart.co.uk/products/16800459-terminal-blocks-20a-65a
store_origin: GB
region: United Kingdom
---

# 30A current rating Closed back insulation 8 isolated screw circuits Terminal Blocks 20A - 65A

**Brand:** blue sea systems
**Price:** £16.92
**Availability:** ✅ In Stock

## Summary

> 🔌 Connect smarter, power stronger — the pro’s choice for seamless circuits!

## Quick Answers

- **What is this?** Terminal Blocks 20A - 65A by blue sea systems
- **How much does it cost?** £16.92 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/16800459-terminal-blocks-20a-65a)

## Best For

- blue sea systems enthusiasts

## Why This Product

- Trusted blue sea systems brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted by Pros:** Blue Sea Systems quality with a 4.7-star rating and UL certification ensures peace of mind.
- • **Safety First, Always:** Closed back design fully insulates power from mounting surfaces, eliminating risk.
- • **Modular Circuit Control:** Each screw pair acts as an isolated circuit for precise, organized wiring.
- • **Power Up with Confidence:** Handles up to 30 Amps AC/DC at 600V for robust, reliable connections.
- • **Customizable Connectivity:** Jumpers (sold separately) enable easy creation of common circuits—flex your setup.

## Overview

The Blue Sea Systems 2508 Terminal Block is an 8-circuit, 30 Amp rated connector designed for AC/DC applications up to 600V. Featuring a closed back design for full insulation and isolated screw pairs for individual circuits, it offers safe, modular wiring solutions. Compatible with jumpers for common circuit creation, it’s UL certified and highly rated by professionals for durability and ease of use.

## Description

Closed back design completely insulates power from the mounting surface Each screw pair is one isolated circuit Jumpers allow creation of common circuits.

Review: Good quality as expected from them - Great construction and they work
Review: Nice junction for powered items. - Used to create a junction block at my waste tank for when I remove the sending unit (instead of hard wired) this makes removal much faster and easier. Make sure you order the right size (amp, or screw size). Most of the complaints are because somebody ordered a 10 screw size for number 8 connectors (won't work). Sure there are better items but this works for its intended purpose and have no issues.

## Features

- 8 Circuit 30 Amp AC/DC 600V AC/DC Terminal Block
- Closed back design completely insulates power from the mounting surface
- Each screw pair is one isolated circuit
- Jumpers allow creation of common circuits (sold separately)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000K2IK3M |
| Best Sellers Rank | #13,260 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #10 in Ground Circuit Terminal Blocks |
| Brand Name | Blue Sea Systems |
| Color | Black |
| Connector Type | Screw |
| Current Rating | 30 Amps |
| Customer Reviews | 4.7 4.7 out of 5 stars (539) |
| Global Trade Identification Number | 00632085025083 |
| Included Components | Blue Sea 2508 Terminal Block 30AMP - 8 Circuit |
| Item Type Name | Blue Sea 2508 Terminal Block 30AMP - 8 Circuit |
| Item Weight | 0.05 Kilograms |
| Manufacturer | Blue Sea Systems |
| Material Type | Plastic |
| Model | 2508 |
| Mounting Type | Surface Mount |
| Number Of Contacts | 16 |
| Number Of Poles | 8 |
| Number of Positions | 16 |
| Part Number | 2508-BSS |
| Specification Met | UL |
| UPC | 632085025083 |
| Unit Count | 1.0 Count |
| Voltage | 600 Volts |
| Warranty Description | Warranty |

## Product Details

- **Brand:** Blue Sea Systems
- **Color:** Black
- **Connector Type:** Screw
- **Current Rating:** 30 Amps
- **Material:** Plastic
- **Mounting Type:** Surface Mount
- **Number Of Contacts:** 16
- **Number Of Poles:** 8
- **Specification Met:** UL
- **Voltage:** 600 Volts

## Images

![Terminal Blocks 20A - 65A - Image 1](https://m.media-amazon.com/images/I/71NdkUjQ6KL.jpg)
![Terminal Blocks 20A - 65A - Image 2](https://m.media-amazon.com/images/I/71ggoSr6mtL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good quality as expected from them
*by H***S on November 8, 2025*

Great construction and they work

### ⭐⭐⭐⭐⭐ Nice junction for powered items.
*by T***M on August 17, 2016*

Used to create a junction block at my waste tank for when I remove the sending unit (instead of hard wired) this makes removal much faster and easier. Make sure you order the right size (amp, or screw size). Most of the complaints are because somebody ordered a 10 screw size for number 8 connectors (won't work). Sure there are better items but this works for its intended purpose and have no issues.

### ⭐⭐⭐⭐⭐ Blue Sea builds nice stuff!
*by A***F on January 20, 2024*

You end up spending a little more for a Blue Sea product but they almost always offer a high quality part you won't have to worry about. This terminal block is made from a better-than-most plastic that doesn't split or crack when fastening it down. The terminal screws hold and don't strip out easily. It's amazing how fast the cost of a wiring project can balloon out of control but using quality parts will provide a safer system than running generic "unknown" parts.

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---

*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-18*